LinkedIn Person profile API

Please help me write a data collection script with the EveryInfra LinkedIn Person profile endpoint (linkedin/person_profile).

Endpoint contract:
- Request: POST https://api.everyinfra.com/api/v1/social with the header Authorization: Bearer <API key>. Read the key from the EVERYINFRA_API_KEY environment variable and never hard-code it.
- In the request body, set platform to linkedin and action to person_profile, and put the parameters inside params.
- Required parameters:
  - username: Specifies the username handle from a LinkedIn /in/ profile path or a full personal profile URL for person_profile, or an account path for followers.
- Optional parameters:
  - location: Specifies location text for person profiles in profile_search or job locations in jobs. When keyword in the jobs action is already a full search URL, the URL's embedded criteria take precedence and location is ignored.
  - locations: Accepts a location array as a compatibility alias. Prefer location: this array is not guaranteed to behave the same way, and it is not a way to run cross-country batch searches.
  - name: Provides a compatibility identifier that holds company identifiers in company_profile or serves as a person query term in select person_profile lookups.
- Returns one object. Main fields: username, display_name, headline, about (Long-form About text of the profile (pe…), location, current_company, current_company_url (LinkedIn page URL of the current compan…), current_company_logo_url (Logo URL of the current company), follower_count, connection_count (Number of connections (person_profile,…), email (Email address), is_verified; 36 fields in total, full list at https://api.everyinfra.com/api/v1/social/catalog?platform=linkedin.
- Example request body:
{
  "platform": "linkedin",
  "action": "person_profile",
  "params": {
    "username": "williamhgates"
  }
}
- Price: $0.56 per 1,000 requests; failed and empty results are not charged.
- For dozens or hundreds of targets, add "mode": "async" to the body: you get a job_id at once and poll GET https://api.everyinfra.com/api/v1/jobs/{job_id} for the result.
- On 422, fix the request using the suggested parameter names and allowed values in the error; on 429 or 503, wait for Retry-After and try again.

Before writing code, ask me which targets I need, how many, which fields, and what output format I want; then confirm the plan and the rough cost with me.